Cache the mimeTypes and plugins DOM objects.

third_party/WebKit/Source/platform/plugins/PluginData.cpp

 /*
     Copyright (C) 2000 Harri Porten (porten@kde.org)
     Copyright (C) 2000 Daniel Molkentin (molkentin@kde.org)
     Copyright (C) 2000 Stefan Schimanski (schimmi@kde.org)
     Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All Rights Reserved.
     Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #include "platform/plugins/PluginData.h"
 
 #include "platform/plugins/PluginListBuilder.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebSecurityOrigin.h"
+#include "wtf/CurrentTime.h"
 
 namespace blink {
 
 PluginData::PluginData(SecurityOrigin* mainFrameOrigin)
     : m_mainFrameOrigin(mainFrameOrigin)
+    , m_modified(WTF::currentTime())
 {
     PluginListBuilder builder(&m_plugins);
     Platform::current()->getPluginList(false, WebSecurityOrigin(m_mainFrameOrigin), &builder);
 
     for (unsigned i = 0; i < m_plugins.size(); ++i) {
         const PluginInfo& plugin = m_plugins[i];
         for (unsigned j = 0; j < plugin.mimes.size(); ++j) {
             m_mimes.append(plugin.mimes[j]);
             m_mimePluginIndices.append(i);
         }
@@ skipping 28 matching lines @@
 }
 
 void PluginData::refreshBrowserSidePluginCache()
 {
     Vector<PluginInfo> plugins;
     PluginListBuilder builder(&plugins);
     Platform::current()->getPluginList(true, WebSecurityOrigin::createUnique(), &builder);
 }
 
 } // namespace blink